text: /**
   * @name Frequency Spectrum
   * @description <p>Visualize the frequency spectrum of live audio input.</p>
   * <p><em><span class="small"> To run this example locally, you will need the
   * <a href="http://p5js.org/reference/#/libraries/p5.sound">p5.sound library</a>
   * and a running <a href="https://github.com/processing/p5.js/wiki/Local-server">local server</a>.</span></em></p>
   */
  var mic, fft;
  
  function setup() {
     createCanvas(710,400);
     noFill();
  
     mic = new p5.AudioIn();
     mic.start();
     fft = new p5.FFT();
     fft.setInput(mic);
  }
  
  function draw() {
     background(200);
  
     var spectrum = fft.analyze();
  
     beginShape();
     for (i = 0; i<spectrum.length; i++) {
      vertex(i, map(spectrum[i], 0, 255, height, 0) );
     }
     endShape();
  }
  